Device for reenforcing molds



June 2, 1925.

J. E. EVANS DEVICE FOR REENFORCING MOLDS Filed July 21. 1924 PatentedJune 2, 1925. i

1 UNITED STATES JAMES E. EVANS, OF CHICAGO, ILLINOIS,

DEVICE FOR REENFORCING HOLDS.

Application filed July 21, 1924 Serial No. 727,209.

To all whom it may concern. 1

Be it known thatI, JAMES E. EvANs, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Device for Reenforcing Molds, of which thefollowing is a specification.

My invention relates to said molding, and its object is to provide ameans of easily and cheaply 'reenforcing the surface of the mold againstcutting and washing by the inflowing metal.

My invention is illustrated in the accompanying drawing, in which likeletters of reference refer to like parts throughout the several views,and in which Figures 1, 2 and 3 are views in perspective of differentforms of my device, and Figure 4 is a view'in section of a drag or nowelin which the sand has been rammed and from which the pattern has beendrawn leaving the mold, showing the mold reenforced at several points inaccordance with my invention.

In sand molding, although facing sand is used, the surface of the moldis liable to be cut or WtShBd by the molten metal flowing into the mold.This is especially liable to happen at the points or corners of themold.

To prevent such cutting or washing of the mold bythe inflowing metal, myinvention provides a method of facing such portion of the surface of themold as may be desaid leaf, which.

sired, particularly the places where thedam gel of cutting or washing isgreatest, with thin sheet metal, in such a way-that sald reenforcingfacing material may be held firmly in place.

The device which I use for this purpose is preferably made of tin,although it may be made of wrought iron or any other suitable metal. Itis made of sheet metal, from which it'is adapted to be stamped, and itcomprises a relatively large leaf of sheet metal, adapted to rest uponthe surface of the mold, and one or,more thinprongs extending at rightangles from said leaf and ada ted to be pressed into the sand and so holin place on the surface of the mold because of its large extent, willretain inplace a considerable portion of the surface sand of the mold.

When the mold has been completed, the

pattern drawn, the surface of the mold a properly reenforced inaccordance with my invention and the parts of the flask as- .of thesurface.

sembled for the casting, the metal flowing into the mold will not washor cut its surface, the thin sheet metal leaves resting on the surfaceofthe mold and retaining the sand will readily fuse in the casting, andthe thin, flat prongs, the sand and hold the surface reenforcing leavesin place, can be readily chipped off the surface of the casting when itis removed from the mold.

In Figure 1 a is the thin, flat sheet metal leaf adapted to rest on thesurface of the mold. It is made of relatively large area, so as toreenforce a considerable portion In the form of the device shown in saidFigure 1, I have shown a thin fiat prong b and two additional shorterprongs 0 adapted to be pressed into the sand and more securely hold thedevice in place to protect the surface of the mold.

In Figure 2 a is the surface protecting leaf, and b is the in two in thmetal of which the device is made longitudinally from the top about halfway down, then bending the sheet longitudinally to form an angle of 90degrees and then nding over the two portions of the upper part of thesheet as shown, thus also forming the prong b by the longitudinal benddown its center into two sides at right angles to each other. This formof my device would be particularly adapted for a corner in a mold.

In Figure 3 another form showing the leaf aalso in two parts, and theprong b, bent in the same manner as in Figure 2, is shown.

- The prongs may, however, be broader or narrower and may be formed allin one plane, as shown 1n Figure 1, or in two planes, as shown inFigures 2 and 3, and the surface reenforcing leaves may be formed asillustrated or in other forms, as convenience suggests, withoutdeparting from the spirit of my invention, which consists in providingfor use in sand molds a surface facing element of thin sheet materialwhich is readily fusible in the casting and is provided with integralmeans for engaging with the sand and facing element in place. 3

It will be obvious that by reason of the relatively large leaf portionof the device, the surface of themold may be properly parts at rightangles to each other which are pressed intoprong, a being formed e sameplane by cutting the sheet of holding the surface reenforced with theuse of a relatively small number of the devices, without the workmenexpending much time in placing the devices. It will also be obviousthat, by reason of the light construction of the prong or prongs, theywill be easily chipped off from the surface of the casting when it hasbeen removed from the mold.

It will be understood that my device is adapted for use in any portionof the mold. In Figure 4 several of these devices are shown as insertedin the portion of the mold which is formed in a drag, but they would beused in the same way in the portion of a mold which might be formed inthe cope or in a cheek.

Having now described my invention, what I claim as new and desire tosecure by Let ters Patent of the United States is:

'1. A device of the class described comprising a prong member with twosides disposed at an angle to each other, and a leaf member formed bythe prolongation of said sides, the separation of them longitudinallyand the bending of them at substantially an angle of 90 degrees to saidprong.

2. A device of the class described made of one piece of thin sheet metaland comprising. a head adapted'to rest on the surace of the sand andretain the same in place, and a pointed prong at the edge of said headand substantially at a right angle thereto adapted to be imbedded insaid sand and thereby retain said head in place.

3. A device of the class described made of one piece of thin sheet metaland comprising a head adapted to rest on the surface of the sand andretain the same in place, and a plurality of pointed prongs at the edgeof said head and substantially at right angles thereto adapted to beimbedded in said sand and thereby retain said head in place.

4. A device of the class described made of one piece of thin sheetmetal, comprising a head and a pointed prong, the head comprisingmembers disposed at an angle to each other in the same plane, and theprong extending from the edge of the head at substantially a right anglethereto and having its sides disposed at an angle to each 0t ier.

JAMES E. EVA S.

